Comparison

MOBI Reader vs FBReader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MOBI Reader

This app provides a robust reading experience for various ebook formats, including MOBI, AZW, and PRC. It offers extensive customization options for text, page display, and integrates with cloud services for easy access to your library. Enjoy a comfortable and efficient way to read your digital books.

Highlights
  • Supports MOBI, AZW, AZW3, PRC formats
  • Customizable text and page display options
  • Cloud service integration (Google Drive, Dropbox, etc.)
  • Speech synthesizer for audio reading
  • Multiple page turning animations
  • Night mode and brightness control
  • Built-in file manager and web browser
Features
Read full description

The BEST application for reading mobi, azw, prc books. Format 100% supported by the application, including the styles, chapters, tables, links, footnotes etc. The visualization system takes into account the specific character of the format functioning on mobile devices (memory capacity, the number of general processor units etc.), Providing a maximum productivity and comfort when working with large documents. Elegant design, extended functionality, high speed and stability of work will make reading of your favorite literature a pleasurable experience. You can contact technical support and leave a comment without quitting the application. MOBI Reader’s special features: ■ Compatible with all popular archive formats (rar, zip, 7z, gz, tar ...) ■ Speech synthesizer ■ Large set of page turning animations (Slide, Fade, Curl, Flip, Cube, Ripple, Rotate) ■ Night mode ■ Integration with popular cloud services(Google Drive, Dropbox, Box, OneDrive, Yandex.Disk) ■ Integration with popular network services(SMB, FTP, SFTP, WebDAV, DLNA) ■ Open books directly from cloud services and network services ■ Hight application stability ■ Automatic recovery bad and non standard files ■ Search and highlight text options ■ Table of contents ■ Highlight and copy text options ■ Font, Font color, Background, font size, margins, line spacing, hyphenation, hyphenation language, skip author style options ■ Brightness control ■ Rotation lock ■ Bookmarks ■ Double page view ■ Opening documents from external applications ■ Last open document list ■ Online book catalogs(OPDS) ■ Web Browser and download manager ■ Wi-Fi transfer ■ FTP transfer File Manager Features: ■ Intuitive interface ■ iTunes integration ■ File sorting(by name, by extension, by size, by date, by author, by progress) ■ Searching files in subfolders ■ Create, move, copy, rename, pack/unpack, delete file/folder options ■ File/folder search ■ Preview book cover Wi-Fi Transfer Features: ■ Intuitive interface ■ Create, move, rename, delete file/folder options ■ Downloading/uploading few media files with one click ■ Display upload progress Online catalog(OPDS) Features: ■ Maximal support OPDS standards ■ User friendly navigation ■ Global searching ■ Full book information preview ■ Adding and editing catalog options ■ Completely popular catalog list Feel free to ask questions, report bugs or request new features: support@develsoftware.com

About

FBReader

A fast and versatile e-book reader supporting multiple formats like ePub, Kindle, and fb2. It offers cloud syncing for reading progress and a customizable interface. Upgrade to unlock unlimited library access and advanced features.

Highlights
  • Supports ePub, Kindle azw3, fb2, RTF, Word, HTML, and text
  • ePub3 and Readium LCP DRM support
  • Cloud syncing of library and reading positions
  • Customizable appearance and behavior options
  • Direct opening of downloaded files
  • Free version with library limits
Features
Read full description

FBReader is a fast and easy-to-use e-book reader for iPhone and iPad. It supports all major e-book formats, including ePub (with key ePub3 features), Kindle azw3, and fb2 (.zip). You can open both unprotected books and ePub files protected with Readium LCP DRM. FBReader also reads RTF, Word (.doc), HTML, and plain text, so you can keep all your books and documents in one place. Read anywhere and pick up right where you left off. FBReader can sync your library, reading positions, bookmarks, and more across devices using the FBReader Book Network, a cloud service powered by Google Drive. If you prefer managing files yourself, you can download books in your browser and open them directly with FBReader. A wide range of appearance and behavior options lets you customize the reading experience to match your preferences. Free version and upgrade options: • The free version allows up to 10 books in your library. • The built-in translation feature is disabled. Upgrade to the full version to remove these limits and enjoy the complete FBReader experience.

Screenshots

MOBI Reader4 screens
FBReader4 screens

Verdict

The call

The clearest difference is rating: MOBI Reader at 4.0 against FBReader's 3.7. MOBI Reader also leads on review sentiment (63% vs 52%) and iOS requirement (10.0 vs 13.0). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MOBI Reader sells 4 one-off in-app purchases and FBReader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

MOBI Reader holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 188 and 129 respectively. Written reviews point the same way: 63% of MOBI Reader's written reviews are positive against 52% of FBReader's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 7 level
MOBI Reader versus FBReader: the parameters behind the verdict, then further details
ParameterMOBI ReaderFBReader
PriceFreeFree
Rating4.0 (188 ratings) — better3.7 (129 ratings)
Positive reviews63.1% of reviews — better52.5% of reviews
Number of ratings188 — better129
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better13.0
Further details — not scored
Size129 MB22 MB
Age rating17+17+
DeveloperLTD DevelSoftwareFBReader.ORG Limited

Customer experience

MOBI Reader

All ratings187 ratings
Positive78.6%
Neutral3.2%
Negative18.2%
Written reviews295 reviews
Positive63.1%
Neutral5.1%
Negative31.9%

FBReader

All ratings128 ratings
Positive64.8%
Neutral9.4%
Negative25.8%
Written reviews322 reviews
Positive52.5%
Neutral14.0%
Negative33.5%

User reviews

MOBI Reader

From 188 App Store ratings

What we love

  • 👍 Easy to use
  • 📚 Supports various book formats
  • 🔊 Text-to-speech functionality
  • 💻 Works well on both iPhone and iPad

Room to improve

  • 🐛 Crashes and freezes
  • 📂 Difficulty importing books
  • 🔍 Unintuitive user interface
  • 💰 Costly for additional features
  • 🔋 High battery consumption

FBReader

From 129 App Store ratings

What we love

  • 🚀 Fast and smooth reading experience
  • 👍 Simple and intuitive interface
  • 💡 Customizable font, margin, and layout options
  • 🔒 Secure syncing across devices
  • 🎨 Retro background textures

Room to improve

  • 🐛 Occasional crashes and freezes
  • 🔧 Lack of advanced organization features (folders, shelves)
  • 🚫 No PDF support
  • 🔍 Inconsistent search and book discovery
  • 🔒 Privacy concerns around data collection

Bugs and requests

MOBI Reader

Reported bugs

3 issues
  • Crashes when opening certain book files
  • Inability to read MOBI and AZW3 files
  • Syncing issues with cloud storage providers

Requested features

4 requests
  • Dark mode option
  • Improved file management
  • Better support for ePub and MOBI formats
  • Sleep timer for reading sessions

FBReader

Reported bugs

4 issues
  • Syncing issues with Google Drive
  • Deletion of books from library
  • Formatting problems with large footnotes
  • Compatibility issues with newer iOS versions

Requested features

5 requests
  • Vertical scrolling mode
  • Improved bookmark and annotation tools
  • Ability to add/change book covers
  • Text-to-speech functionality
  • Better library management (read/unread, collections)

In-app purchases

4 purchases

MOBI Reader

One-time4
  • Thank the Developer$0.99
  • Appearance Customization$1.99
  • Additional Formats$3.99
Show 1 more
  • Pro Version$5.99
1 purchases

FBReader

One-time1
  • FBReader Full Edition2 variants$12.99

Questions

Is MOBI Reader free?
MOBI Reader is free to download, with in-app purchases available.
Is FBReader free?
FBReader is free to download, with in-app purchases available.
Which has better reviews, MOBI Reader or FBReader?
MOBI Reader is rated higher. MOBI Reader averages 4.0 out of 5 from 188 ratings, while FBReader averages 3.7 from 129 ratings.
Do MOBI Reader or FBReader have ads?
Neither MOBI Reader nor FBReader shows ads.
Which is updated more often, MOBI Reader or FBReader?
MOBI Reader ships an update monthly, and FBReader monthly. Most recently, MOBI Reader was updated on October 24, 2026 and FBReader on October 29, 2026.

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